Rather than assuming that a joyful expression of thanks is some sort of romantic gesture, perhaps she was just happy to have someone donating books. Or even just an appreciation of someone asking her nicely about donating books, rather than just cramming them in a night-return slot with a note that says 'Free' on them. ;\) Or maybe just happy to have someone *in* the library.

My job involves books and libraries, and so I deal with librarians all over the country. So this topic is close to my heart. They are a unique group of people. It takes a special kind of person to be a 'career' librarian. But for all of them, you'd be amazed at how happy they are with donations of books. Times are very tough for a lot of libraries and librarians. Their budgets are very low-hanging fruit for a lot of states & municipalities.
M80v2 | VP150v2 | QS8v2
SVS Pci+ 20-39
Emotiva UMC-1 & LPA-1
M22ti + T-Amp, in the Office